I am using the latest version of WordPress, as well as the buddy press plugin.
I am wondering now if you can tell me how to do two quick modifications

First, whenever someone goes to message another user, the box is cut off, (this all due to my theme). Would it be possible that I have the msg box open in a new pop-up window?

Also, whenever my users go to register, there is no box available for them that says 'register through facebook.' Is it possible to configure my server to work like this website?https://www.couchsurfing.org/#nav_signup